how the PopUpMenuButton generates events and how an application can handle them
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<!-- menus/PopUpMenuButtonEvents.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"
height="600" width="600" creationComplete="initData();">
<fx:Script>
import mx.events.*;
import mx.controls.*;
// Set the Inbox (fourth) item in the menu as the button item.
private function initData():void {
Menu(p1.popUp).selectedIndex=3;
}
// itemClick event handler, invoked when you select from the menu.
// Shows the event's label, index properties, and the values of the
// label and data fields of the data provider entry specified by
// the event's item property.
public function itemClickHandler(event:MenuEvent):void {
Alert.show("itemClick event label: " + event.label
+ " \nindex: " + event.index
+ " \nitem.label: " + event.item.label
+ " \nitem.data: " + event.item.data);
}
//Click event handler for the main button.
public function clickHandler(event:MouseEvent):void {
Alert.show(" Click Event currentTarget.label: " + event.currentTarget.label);
}
//The menu data provider
[Bindable]
public var menuDP:Array = [
{label: "Inbox", data: "inbox"},
{label: "Calendar", data: "calendar"},
{label: "Sent", data: "sent"},
{label: "Deleted Items", data: "deleted"},
{label: "Spam", data: "spam"}
];
</fx:Script>
<mx:PopUpMenuButton id="p1" showRoot="true"
dataProvider="{menuDP}" click="clickHandler(event);" itemClick="itemClickHandler(event);" />
</s:Application>
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